#6886: Configurable CSW filters

[dsuren1]

Description

This PR adds possibility to configure CSW filters from localConfig and from advanced settings of Catalog

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x", remove the others)

• Enhancement

Issue

What is the current behavior?
#6886 & #7084

What is the new behavior?
The CSW filter is configurable as below

• staticFilter - filter is always applied, even when search text is NOT PRESENT
• dynamicFilter - filter is used when search text is PRESENT and is applied in AND with staticFilter. The template is used with ${searchText} placeholder to append search string

Example

{ 
  filter: {
    staticFilter: "<ogc:Or><ogc:PropertyIsEqualTo><ogc:PropertyName>dc:type</ogc:PropertyName><ogc:Literal>dataset</ogc:Literal></ogc:PropertyIsEqualTo></ogc:Or>",
    dynamicFilter: "<ogc:PropertyIsLike wildCard='*' singleChar='_' escapeChar='\\'><ogc:PropertyName>csw:AnyText</ogc:PropertyName><ogc:Literal>${searchText}*</ogc:Literal></ogc:PropertyIsLike>"
  }
}

Note: filter - For both static and dynamic filter, input only xml element contained within ogc:Filter (i.e. Do not enclose the filter value in ogc:Filter)

Breaking change

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No

Other useful information

[offtherailz]

Works well. Only one fix:

• In dashboard, the advanced settings for catalog are shown, but the filter is not used.

CSW_filter_Dashboard.mp4

[tdipisa]

@ElenaGallo please test this in DEV and let us know if we can backport to 2021.02.xx

[ElenaGallo]

Test passed, @dsuren1 please backport to 2021.02.xx